Plain text files have no formatting information — no fonts, no margins, no styles. Converting one to PDF means choosing a rendering engine to apply those defaults. The choice of engine determines what the output looks like and how much control you have over the result.
What a text-to-PDF converter does
A text-to-PDF converter opens the .txt file and renders it as a document, applying a font, margins, line spacing, and page size. The converter determines all of these settings, not the file itself. A file that looks compact in a monospace text editor may produce several pages when rendered with a proportional font and standard margins.
Unicode text — including accented characters, CJK characters, and special symbols — is supported by any converter that uses a full Unicode-capable font. Most modern converters handle UTF-8 text correctly. Files in other encodings (Windows-1252, Latin-1) may require re-encoding first if the output shows incorrect characters.
Using Filum's TXT to PDF tool
Filum's TXT to PDF tool uploads the file to a LibreOffice server, which renders it with default margins, a clean font, and standard line spacing, then exports a PDF. The output is a readable document suitable for printing or sharing.
The tool requires an upload — LibreOffice runs on a remote server, not in the browser. The file is sent over an encrypted connection, converted, and immediately deleted. No account is required, and there is no permanent storage of the file.
The font and margins applied by LibreOffice are its defaults: Liberation Mono or Liberation Sans, with A4 or letter paper depending on the server locale. These are not configurable via the online tool. If you need specific fonts, margins, or styles, the document-as-code approach (LaTeX, Pandoc) gives you full control.
When to use LibreOffice vs. other methods
LibreOffice is the right choice for a clean, readable PDF from any plain text file. It handles UTF-8 correctly, preserves line breaks, and produces a well-formatted output without any configuration.
For developer use cases — generating PDFs from text output, converting README files, producing printable logs — Pandoc offers a command-line path with fine-grained control over output style. Pandoc converts Markdown, reStructuredText, and plain text to PDF via LaTeX or via wkhtmltopdf. The dependency footprint is larger, but the output is publication-quality.
For simple quick conversions, a browser's File → Print → Save as PDF also works on text files. Open the .txt in your browser (drag to the address bar), then print to PDF. The browser applies its own font and layout, which varies between browsers.
Preserving fixed-width formatting
Plain text files often contain fixed-width formatting: tables made of spaces and dashes, code, aligned columns. This formatting depends on every line being displayed in a monospace font at the same width. A converter that uses a proportional font will break this alignment.
If fixed-width formatting matters, choose a converter that uses a monospace font — or convert the file to a format that encodes the formatting explicitly (Markdown with code blocks, for example) before converting to PDF.